<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>demo7-双向数据绑定-select</title>
    <script src="https://cdn.staticfile.org/vue/2.2.2/vue.min.js"></script>
</head>
<body>
<div id="case2-userinput">
    <select v-model="selected">
        <option disabled value="">请选择</option>
        <option>A</option>
        <option>B</option>
        <option>C</option>
    </select>
    <span>{{selected}}</span>
</div>
<script type="text/javascript">
    var vuejsselect=new Vue({
        el:"#case2-userinput",
        data:{
            selected:"请选择"
        }
    })
</script>
</body>
</html>